Evaporator for refrigerating apparatus



June 2 1936.

w. D. QOLLINS EVAPORATOR FOR REFRIGERATING APPARATUS Filed May 17, 1932 2 Sheets-Sheet l :A v w U June 2, 1936. w. D. COLLINS EVAPORATOR FOR REFRIGERATING APPARATUS Filed May 17, 1952 2 Sheets-Sheet 2 iii- 7. 4,

IN VEH TOR.

A TTORNEY Patented June 2, 1936 PATENT OFFICE EVAPORATOR FOR REFRIGERATING APPARATUS I William D. Collins, Evansville, Ind., assignor to Servel, Inc., New York, N. Y., a corporation of Delaware Application May 17, 1932, Serial No. 611,829

1 Claim.

This invention relates to evaporators made of pressed or stamped sheet metal, and it is an object of the invention to provide an evaporator of this type having a plurality of freezing compartments which will accommodate different size containers. The invention, together with the objects and advantages thereof, will appear upon consideration of the following'description taken in connection with the accompanying drawings forming part of this specification and of which:

Fig. 1 is a front elevation with parts broken away illustrating one application of the invention;

Fig. 2, aside elevation;

Fig. 3, a detailed section on the line 3-3 of Fig. 2;

Fig. '4, a vertical section on the line 4-4, of Fig. 1; and

iFig. 5, a horizontal section on the line 5-5 of F g. 4.

Referring to Figs. 1-5 of the drawings, the evaporator comprises an outer corrugated sheet metal shell l0, and an inner shell formed of a plurality of individual sleeves or casings H, I2, and I3. The inner shell may be formed of any number of sections in the present instance I being shown, and each being adapted to receive a tray or container of a corresponding size, whereby each tray may be individually refrigerated on all four sides. The inner and outer sections are united by welding or any other de sired means at their extremities, to form a closed chamber for refrigerant between the shells and a header I4, is provided at the top along the center and between the outer and inner shells.

The header I4 is substantially cylindrical in shape, formed by an upwardly curved portion of the outer shell and cooperating similarly curved depending portions of the uppermost inner shells ll. Corrugations l5 areprovided in the outer shell and extend at right angles from I the header i l and form refrigerant channels or passageways extending from such header.

The outer shell is shown as constructed of a single sheet of metal welded longitudinally along the center of its bottom, thus limiting the length of the channels extending from the header. However, the channels may and are preferably made continuous, so that refrigerant may flow entirely around the exterior of the inner shell. The upper shells ll, may also beprovided with short corrugations 16, extending from the header in opposed relation to the corrugations 55,

to afford enlarged communication with the header at the entrance to the channels formed by the corrugations.

The sleeves ll, l2, and I3 correspond in length to the length of the evaporator, and are nested together in the manner shown, and are not only welded at their ends where they engage the outer shell, but are welded entirely around each end to enclose fluid-tight spaces around each of the inner shells. The shells ll, l2, and I3 are provided with vertical corrugations l1 and I8, and horizontal corrugations l9. and 20, which form refrigerant channels) The upper sleeves or shells ll, may be welded longitudinally in any desired location, but are shown welded longitudinally along the center of their bottoms at 2|. In like manner the shells l2'are welded at 22, the enlarged lower shell being similarly welded In order to increase their heat exchange surfaces the evaporator is provided with side fins 24, and top fins 25, such fins being formed in any desired manner, or shape. The fins 24 and 25 may be formed integrally in substantially L- shape if desired. Also the header It may be closed at its ends in any desired manner by closuremembers 26,-and 21. The evaporator may be supported in any convenient way, as for example by four or more studs 28, which receive bolts extending, through a wall portion of the cabinet. .1

It willbe apparent to those skilled in the art that various changes may be made in theconstruction and arrangement without departing from the spirit of the invention, and. therefore the invention is not limited to that which is described in the specification and shown in the drawings, but' only as indicated. in the following claim.

What is claimed is:

An evaporator fabricated of sheet metal to form a horizontally cylindrical header, two outer horizontally spaced vertical rows of fluid passages communicating at their upper ends with said header, an inner vertical row of passages extending from said header downwardly between said outer vertical rows but terminating short of the lower ends thereof, and a plurality of vertically spaced horizontal rows of liquid passages connecting said vertical rows of passages to form a single lower compartment, and a plurality of horizontally spaced upper compartments completely surrounded by fluid passages.

WILLIAM D. COLLINS. 

